Had a thought for excadrill. A high speed jolly nature might work with excadrill. It won't come close to the sand sets in power, but might have potential.
Ability: mold breaker
item: air balloon/razor claw
stealth rock: heard this works well with MB. Useful for volcarona switch-ins.
drill run/earthquake: STAB, of course. Prefer drill run for crit. rate with razor claw.
iron head/shadow claw: more STAB, or decent coverage. SC works with razor claw.
swords dance/ x-scissor/ rock slide/ rapid spin/ shadow claw: coverage, power or support.
Basically trying to break walls normally unbroken, relying more on luck than raw power. drill run sets are viable in doubles as MB nullifies allies levitate & sturdy too, making it potentially fatal. iron head hits cryogonal, and smacks aerodactyl and a few others around. Shadow claw is for gliscor, as it would wall it other wise. Plus, between MB, drill run and razor claw, can catch battle armour 'mon off guard. Last move is coverage, I like swords dance here. if stealth rock forces a switch, it can power up the mole. this should work beautifully on forretress, as when the opponent swaps it in to spin stealth rock away, a +2 mold breaker drill run could KO through sturdy. Plus after a boost it should be very hard to phase out.
Razor claw is for the reasons above, but air balloon is good against garchomp. Garchomp may fire off earthquake, and the miss will give excadrill the chance to hit back. MB allows it to ignore sand veil too. This should also work on sturdy donphan.
Main problem is lack of recovery, and lower speed compared to sand rush. It may have have to forfeit rapin spin too, which is a shame. The pluses are being able to take out 'mon it would usually have trouble with, harass the ones you can't with stealth rock and say "screw you" to forretress. possibly even a viable mold breaker set for doubles that doesn't shoot you in the foot if you like using levitate. The crit rate. stuff is to try to compensate for the power loss compared to sand force, and with a little luck, bypass defense boosters. The immunities to toxic and thunder wave are the icing on the cake. Best of all, with mold breaker heavy mole here can KO gengar and mismagius through levitate, who would normally spin-block it.
I've been itching to try this one but i'd like a second opinion before I start. Any thoughts?
And yes, I know I just wrote excadrill war and peace, so thanks for bearing with me.